Capacitive type touch detection means and detection method
US9927904B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2014 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Dec 17, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04112
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are a capacitive type touch detection means and a detection method using a new scheme, which detects a touch signal using a difference between voltage magnitudes detected by a touch detector according to whether a touch is generated, when an alternating voltage is applied to a line equivalent capacitor formed between a sensing pad which is detecting a touch signal and a non-sensing pad adjacent to the sensing pad. The touch detection means includes: a sensing pad configured to generate the touch capacitance Ct between a sensing pad and the touch input means; an alternating voltage configured to be applied to a line equivalent capacitor Ceq formed between the sensing pad and a non-sensing pad adjacent to the sensing pad; and a touch detector connected to the sensing pad to detect a difference in voltage generated according to whether the touch is generated by the touch input means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.